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package dhcpv6
import (
"errors"
"fmt"
"net"
"reflect"
"testing"
"time"
"github.com/google/go-cmp/cmp"
"github.com/stretchr/testify/require"
"github.com/u-root/uio/uio"
)
func TestIAPrefixParseAndGetter(t *testing.T) {
for i, tt := range []struct {
buf []byte
err error
want []*OptIAPrefix
}{
{
buf: []byte{
0, 26, // IAPrefix option code
0, 25, // length
0, 0, 0, 1, // PreferredLifetime
0, 0, 0, 2, // ValidLifetime
16, // prefix length
0x24, 1, 0xdb, 0, 0x30, 0x10, 0xc0, 0x8f, 0xfa, 0xce, 0, 0, 0, 0x44, 0, 0, // v6-prefix
},
want: []*OptIAPrefix{
&OptIAPrefix{
PreferredLifetime: 1 * time.Second,
ValidLifetime: 2 * time.Second,
Prefix: &net.IPNet{
IP: net.IP{0x24, 1, 0xdb, 0, 0x30, 0x10, 0xc0, 0x8f, 0xfa, 0xce, 0, 0, 0, 0x44, 0, 0},
Mask: net.CIDRMask(16, 128),
},
Options: PrefixOptions{Options: Options{}},
},
},
},
{
buf: []byte{
0, 26, // IAPrefix option code
0, 25, // length
0, 0, 0, 1, // PreferredLifetime
0, 0, 0, 2, // ValidLifetime
0, // prefix length
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // v6-prefix
},
want: []*OptIAPrefix{
&OptIAPrefix{
PreferredLifetime: 1 * time.Second,
ValidLifetime: 2 * time.Second,
Prefix: nil,
Options: PrefixOptions{Options: Options{}},
},
},
},
{
buf: []byte{
0, 26, // IAPrefix option code
0, 25, // length
0, 0, 0, 1, // PreferredLifetime
0, 0, 0, 2, // ValidLifetime
16, // prefix length
0x24, 1, 0xdb, 0, 0x30, 0x10, 0xc0, 0x8f, 0xfa, 0xce, 0, 0, 0, 0x44, 0, 0, // v6-prefix
0, 26, // IAPrefix option code
0, 25, // length
0, 0, 0, 15, // PreferredLifetime
0, 0, 0, 14, // ValidLifetime
32, // prefix length
0x24, 1, 0xdb, 0, 0x30, 0x10, 0xc0, 0x8f, 0xfa, 0xce, 0, 0, 0, 0x44, 0, 0, // v6-prefix
},
want: []*OptIAPrefix{
&OptIAPrefix{
PreferredLifetime: 1 * time.Second,
ValidLifetime: 2 * time.Second,
Prefix: &net.IPNet{
IP: net.IP{0x24, 1, 0xdb, 0, 0x30, 0x10, 0xc0, 0x8f, 0xfa, 0xce, 0, 0, 0, 0x44, 0, 0},
Mask: net.CIDRMask(16, 128),
},
Options: PrefixOptions{Options: Options{}},
},
&OptIAPrefix{
PreferredLifetime: 15 * time.Second,
ValidLifetime: 14 * time.Second,
Prefix: &net.IPNet{
IP: net.IP{0x24, 1, 0xdb, 0, 0x30, 0x10, 0xc0, 0x8f, 0xfa, 0xce, 0, 0, 0, 0x44, 0, 0},
Mask: net.CIDRMask(32, 128),
},
Options: PrefixOptions{Options: Options{}},
},
},
},
{
buf: []byte{0, 3, 0, 1, 0},
want: nil,
err: uio.ErrUnreadBytes,
},
{
buf: []byte{
0, 26, // IAPrefix option code
0, 8, // length
1, 0, 0, 0, // T1
0, 0, 0, 1, // T2
// truncated from here
},
want: nil,
err: uio.ErrBufferTooShort,
},
{
buf: []byte{
0, 26, // IANA option code
0, 26, // length
0, 0, 0, 1, // T1
0, 0, 0, 2, // T2
8,
0x24, 1, 0xdb, 0, 0x30, 0x10, 0xc0, 0x8f, 0xfa, 0xce, 0, 0, 0, 0x44, 0, 0, // IPv6
0, // malformed options
},
want: nil,
err: uio.ErrUnreadBytes,
},
} {
t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
var mo PDOptions
if err := mo.FromBytes(tt.buf); !errors.Is(err, tt.err) {
t.Errorf("FromBytes = %v, want %v", err, tt.err)
}
if got := mo.Prefixes(); !reflect.DeepEqual(got, tt.want) {
t.Errorf("Prefixes = %#v, want %#v", got, tt.want)
}
if len(tt.want) >= 1 {
var b PDOptions
for _, iana := range tt.want {
b.Add(iana)
}
got := b.ToBytes()
if diff := cmp.Diff(tt.buf, got); diff != "" {
t.Errorf("ToBytes mismatch (-want, +got): %s", diff)
}
}
})
}
}
func TestOptIAPrefixString(t *testing.T) {
buf := []byte{
0x00, 0x00, 0x00, 60, // preferredLifetime
0x00, 0x00, 0x00, 50, // validLifetime
36, // prefixLength
0x20, 0x01, 0x0d, 0xb8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ipv6Prefix
}
var opt OptIAPrefix
err := opt.FromBytes(buf)
require.NoError(t, err)
str := opt.String()
require.Contains(
t, str,
"Prefix=2001:db8::/36",
"String() should return the ipv6addr",
)
require.Contains(
t, str,
"PreferredLifetime=1m",
"String() should return the preferredlifetime",
)
require.Contains(
t, str,
"ValidLifetime=50s",
"String() should return the validlifetime",
)
}
|
